Fun Fact of the Day Posted on March 27, 2020 by Sonoran Conservative The SR-71 was built using a ‘slide rule’, and was the last major U.S. aircraft to do so. Source Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Related
Slide rules are amazing. There even used to be a navigation slide rule used by aviators if their electronic navigation gear failed. They may not use them now but they did in 60’s and 70’s. LikeLiked by 1 person Reply ↓
Sonoran Conservative 
Slide rules are amazing. There even used to be a navigation slide rule used by aviators if their electronic navigation gear failed. They may not use them now but they did in 60’s and 70’s.
LikeLiked by 1 person